CN111379083A - Presser foot lifting device, sewing machine and control method of presser foot lifting device - Google Patents
Presser foot lifting device, sewing machine and control method of presser foot lifting device Download PDFInfo
- Publication number
- CN111379083A CN111379083A CN201811648225.2A CN201811648225A CN111379083A CN 111379083 A CN111379083 A CN 111379083A CN 201811648225 A CN201811648225 A CN 201811648225A CN 111379083 A CN111379083 A CN 111379083A
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- presser foot
- motor
- lifting device
- controller
- foot lifting
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
- D05B29/02—Presser-control devices
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/10—Electrical or electromagnetic drives
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention provides a presser foot lifting device, a sewing machine and a control method of the presser foot lifting device, wherein the presser foot lifting device comprises: a motor; the transmission structure is connected with the motor so as to drive the transmission structure to move through the motor; the pressure foot is connected with the output end of the transmission structure so as to drive the pressure foot to lift up or fall down through the transmission structure; the controller is connected with the motor and controls the pressure of the presser foot by controlling the output current of the motor; and the encoder is connected with the motor and the controller and is used for detecting the working state of the motor and feeding back the working state of the motor to the controller. Through the technical scheme provided by the invention, the technical problem that the pressure of the presser foot is not convenient to control in the prior art can be solved.
Description
Technical Field
The invention relates to the technical field of sewing machines, in particular to a presser foot lifting device, a sewing machine and a control method of the presser foot lifting device.
Background
Sewing machines are currently machines that use one or more sewing threads to form one or more stitches in the material to interlace or stitch one or more layers of the material. The presser foot lifting device on the sewing machine is used for lifting or putting down the presser foot, and the sewing thread is arranged on the cloth in a penetrating way by lifting and falling the presser foot lifting device so as to realize sewing.
In the prior art, the pressure of the presser foot is generally controlled by controlling the rotation angle of a motor of the presser foot lifting device, the control mode is inconvenient, and meanwhile, the pressure of the presser foot lifting device cannot be accurately controlled. And lift presser foot device among the prior art at the during operation, earlier turn into the turned angle of motor earlier the compression volume of spring, the motion of rethread spring drive presser foot also can make the pressure that the spring transmitted to on the presser foot inaccurate like this.
Disclosure of Invention
The invention mainly aims to provide a presser foot lifting device, a sewing machine and a control method of the presser foot lifting device, so as to solve the technical problem that the pressure of a presser foot is not convenient to control in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a presser foot lifting device including: a motor; the transmission structure is connected with the motor so as to drive the transmission structure to move through the motor; the pressure foot is connected with the output end of the transmission structure so as to drive the pressure foot to lift up or fall down through the transmission structure; the controller is connected with the motor and controls the pressure of the presser foot by controlling the output current of the motor; and the encoder is connected with the motor and the controller and is used for detecting the working state of the motor and feeding back the working state of the motor to the controller.
Further, the transmission structure is a connecting rod structure to drive the presser foot to move through the connecting rod structure.
Further, lift presser foot device still includes: the pressure bar is connected with the pressure foot, and the output end of the connecting rod structure is connected with the pressure bar so as to drive the pressure foot to move through the pressure bar.
Furthermore, a sliding groove is formed in the pressure lever, the output end of the connecting rod structure is movably arranged in the sliding groove along the extending direction of the sliding groove, and the output end of the connecting rod structure is abutted against the groove wall of the sliding groove so as to drive the pressure lever to lift or fall through the sliding groove.
Furthermore, the output end of the connecting rod structure is a sliding block, a sliding block seat is arranged on the pressing rod, and a sliding groove is arranged on the sliding block seat so as to drive the pressing rod to lift or fall through the matching of the sliding block and the sliding block seat.
Further, the extending direction of the sliding groove is perpendicular to the moving direction of the pressure rod.
According to another aspect of the present invention, there is provided a sewing machine including: a housing; and the presser foot lifting device is arranged on the machine shell and is used for lifting the presser foot.
According to another aspect of the present invention, there is provided a method for controlling a presser foot lifting device, the method for controlling the presser foot lifting device being the above-mentioned method for controlling the presser foot lifting device, the method comprising: sending a first working instruction to the motor by using the controller so as to enable an output shaft of the motor to rotate by a first preset angle and drive the presser foot to fall down for sewing; detecting whether the motor executes a first working instruction or not by using the encoder when the presser foot falls onto the needle plate and transmitting a signal to the controller; when the motor does not complete the first work instruction, the controller continuously sends the first work instruction to the motor so as to enable the presser foot to generate continuous and stable pressure on the needle plate.
Further, the control method of the presser foot lifting device further comprises the following steps: when the motor completes the first working instruction, the encoder transmits a signal of the motor completing the first working instruction to the controller; enabling the controller to send a second working instruction to the motor so as to enable the output shaft of the motor to rotate by a second preset angle; when the encoder detects that the motor does not complete the second working instruction, the controller continuously sends a third working instruction to the motor so as to keep the output shaft of the motor at a third preset angle, so that the presser foot generates continuous and stable pressure on the needle plate; wherein the third predetermined angle is equal to the sum of the first predetermined angle and the second predetermined angle.
Further, the control method of the presser foot lifting device further comprises the following steps: the controller is used for controlling the current of the motor so as to control the pressure of the presser foot on the needle plate.
Further, the control method of the presser foot lifting device further comprises the following steps: and sending a fourth working instruction to the motor by using the controller so as to enable the output shaft of the motor to rotate by a fourth preset angle and lift the presser foot, wherein the rotating direction of the fourth preset angle is opposite to the rotating direction of the first preset angle.
Further, the control method of the presser foot lifting device further comprises the following steps: and controlling the size of the fourth preset angle by using the controller so as to control the lifting height of the presser foot by controlling the fourth preset angle.
By applying the technical scheme of the invention, when the presser foot lifting device works, the motor drives the presser foot to lift or fall, and the controller controls the pressure of the presser foot by controlling the output current of the motor. Meanwhile, the encoder detects the working state of the motor and feeds the working state of the motor back to the controller, and the controller can judge whether the presser foot falls down or lifts and sends a corresponding working instruction to the motor according to a signal detected by the encoder. Therefore, the pressure of the presser foot can be conveniently controlled, and the accuracy of the pressure of the presser foot can be improved, so that the sewing accuracy is further improved. Therefore, the technical problem that the pressure of the presser foot is inconvenient to control by the presser foot lifting device in the prior art can be solved by adopting the technical scheme provided by the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic structural view of a presser foot lifting device which can be easily provided according to an embodiment of the present invention.
Wherein the figures include the following reference numerals:
10. a motor; 20. a transmission structure; 21. a slider; 22. a first link; 23. a second link; 231. a hinged end; 24. a third link; 30. a presser foot; 40. a pressure lever; 50. a slider seat; 60. a guide structure; 61. a first guide sleeve; 62. a second guide sleeve; 70. a compression bar guide frame; 71. a limiting bulge; 80. a needle plate; 90. an encoder.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, a first embodiment of the present invention provides a presser foot lifting device, including: motor 10, drive mechanism 20, presser foot 30, controller and encoder 90. Wherein, the transmission structure 20 is connected with the motor 10, so as to drive the transmission structure 20 to move through the motor 10. The presser foot 30 is connected with the output end of the transmission structure 20 so as to drive the presser foot 30 to lift or fall through the transmission structure 20. The controller is connected with the motor 10, and the controller controls the pressure of the presser foot 30 by controlling the output current of the motor 10. The encoder 90 is connected with the motor 10 and the controller, and the encoder 90 is used for detecting the working state of the motor 10 and feeding back the working state of the motor 10 to the controller.
When the presser foot lifting device provided by the invention is used, when the presser foot lifting device works, the motor 10 rotates and drives the motor 10 to drive the presser foot 30 to lift or fall through the transmission structure 20, and the controller controls the output current of the motor 10 according to the actual sewing requirement, so that the purpose of controlling the pressure of the presser foot 30 is achieved. Meanwhile, the encoder 90 detects the working state of the motor 10 and feeds back the working state of the motor 10 to the controller, and the controller can judge whether the presser foot 30 falls down or lifts up according to the signal detected by the encoder 90 and send a corresponding working instruction to the motor 10. The controller in this embodiment may be a computer, and controls the output current of the motor 10 under different sewing conditions by controlling relevant setting parameters of the computer. Thus, the pressure of the presser foot 30 can be conveniently controlled, the accuracy of the pressure of the presser foot 30 can be improved, and the sewing accuracy is further improved. Therefore, the technical problem that the pressure of the presser foot 30 is inconvenient to control by the presser foot lifting device in the prior art can be solved by adopting the technical scheme provided by the invention.
Specifically, the transmission structure 20 in this embodiment is a link structure, so as to drive the presser foot 30 to move through the link structure. With such an arrangement, the presser foot 30 can be more easily lifted or dropped.
In order to facilitate lifting or lowering the presser foot 30, the presser foot lifting device in this embodiment further includes a pressing rod 40. Wherein, the pressure lever 40 is connected with the pressure foot 30, and the output end of the connecting rod structure is connected with the pressure lever 40 so as to drive the pressure foot 30 to move through the pressure lever 40.
In order to better lift or drop the presser foot 30, the pressing rod 40 in this embodiment is provided with a sliding groove. Specifically, the output end of the connecting rod structure is movably arranged in the sliding groove along the extending direction of the sliding groove, and the output end of the connecting rod structure is abutted against the groove wall of the sliding groove so as to drive the pressing rod 40 to lift or fall through the sliding groove. When the motor 10 rotates, the motor 10 drives the connecting rod structure to move, and the output end of the connecting rod structure slides in the sliding groove and drives the pressing rod 40 to move.
In order to facilitate the output end of the connecting rod structure to be movably arranged in the sliding groove, the output end of the connecting rod structure in the embodiment is the sliding block 21, the sliding block seat 50 is arranged on the pressing rod 40, and the sliding groove is arranged on the sliding block seat 50 so as to drive the pressing rod 40 to lift or fall through the matching of the sliding block 21 and the sliding block seat 50. With such an arrangement, the stability of the entire structure can be improved, and the presser foot 30 can be driven to lift or fall more stably.
Specifically, the extending direction of the sliding groove is perpendicular to the moving direction of the pressing rod 40. The pressing rod 40 in this embodiment moves vertically up and down in a direction perpendicular to the needle plate 80, and in order to better drive the pressing rod 40 to move up and down through the transmission structure 20, the extending direction of the sliding groove is set to be a horizontal direction. Adopt such setting, the motion of link structure's output will be divided into the motion of horizontal direction and the motion of vertical direction, the motion of link structure output in order to carry out the horizontal direction is slided along the extending direction of sliding tray, the link structure output drives presser foot 30 and lifts or falls down in order to carry out the motion of vertical direction along vertical direction, like this, can conveniently shift the effort of the vertical direction of link structure output on presser foot 30 entirely, in order to compress tightly the cloth to faller 80, the waste of energy has been avoided simultaneously.
In this embodiment, the link structure includes a first link 22 and a second link 23, a first end of the first link 22 is connected to the motor 10, a second end of the first link 22 is connected to a first end of the second link 23, and a second end of the second link 23 is connected to the presser foot 30, so as to drive the presser foot 30 to lift or fall through the second link 23.
In order to improve the stability of the structure and movement of the link structure, the second link 23 in this embodiment is provided with a hinge end 231. Specifically, the hinged end 231 is hinged to the housing, and the first link 22 drives the second link 23 to rotate around the hinged end 231, and drives the presser foot 30 to move through the second link 23.
To facilitate increased flexibility of movement, the link structure in this embodiment further includes a third link 24. The third link 24 is disposed between the first link 22 and the second link 23, and the first link 22 drives the second link 23 to move through the third link 24.
In order to better lift or drop the presser foot 30, the presser foot lifting device in this embodiment further includes a guide structure 60. The guide structure 60 is sleeved on the pressing rod 40 to guide the movement of the pressing rod 40 through the guide structure 60.
Specifically, the guiding structure 60 in this embodiment is a guiding sleeve assembly, which is sleeved on the pressing rod 40 to guide the pressure foot 30 to lift or fall through the guiding sleeve assembly.
To better guide the movement of the presser foot 30, the guide sleeve assembly in this embodiment comprises a first guide sleeve 61 and a second guide sleeve 62. The first guide sleeve 61 and the second guide sleeve 62 are spaced apart from each other on the pressing rod 40 to guide the movement of the pressing rod 40 through the first guide sleeve 61 and the second guide sleeve 62.
In this embodiment, the presser foot lifting device further includes a presser bar guide frame 70, the presser bar guide frame 70 is disposed on the presser bar 40, the presser bar guide frame 70 has a limiting protrusion 71, and the limiting protrusion 71 is clamped on the member to be connected to limit the rotation of the presser bar 40 by the limiting protrusion 71. Specifically, the to-be-connected component is a casing, a limiting groove is formed in the casing, and the limiting protrusion 71 is arranged in the limiting groove to prevent the pressing rod 40 from rotating.
By adopting the presser foot lifting device provided by the embodiment, during sewing, the motor 10 outputs a clockwise moment, the clockwise moment is converted into a downward pressure through the transmission structure 20 and is applied to the slider seat 50, and the slider seat 50 drives the pressing rod 40 and the presser foot 30 to move downwards together, so that the downward pressure of the slider seat 50 can be converted into the downward pressure of the presser foot 30. The pressure value of the presser foot 30 can be adjusted by changing the current of the motor 10.
After sewing is finished, the controller controls the motor 10 to output a counterclockwise moment, the counterclockwise moment is converted into an upward pressure through the transmission structure 20 and is applied to the slider seat 50, and the slider seat 50 drives the pressing rod 40 and the presser foot 30 to move upward together, so that the presser foot 30 is pulled upward, and the action of lifting the presser foot 30 is finished. The elevation height of the presser foot 30 depends on the angle of rotation of the motor 10.
An embodiment of the present invention provides a sewing machine, including: a machine shell and a presser foot lifting device. The presser foot lifting device is arranged on the machine shell and is the one provided in the first embodiment.
The third embodiment of the invention provides a control method of a presser foot lifting device, the control method of the presser foot lifting device adopts the presser foot lifting device provided by the first embodiment, and the control method comprises the following steps: the controller sends a first operating command to the motor 10 to rotate the output shaft of the motor 10 by a first predetermined angle and drive the presser foot 30 to fall down for sewing. The encoder 90 is used to detect whether the motor 10 has executed the first work order when the presser foot 30 is dropped onto the needle plate 80 and to transmit a signal to the controller. When the motor 10 does not complete the first work order, the controller will continuously send the first work order to the motor 10, so that the presser foot 30 generates a continuously stable pressure on the needle plate 80.
Specifically, the control method of the presser foot lifting device further comprises the following steps: when the motor 10 completes the first work order, and at this time, the output shaft of the motor 10 does not apply pressure to the needle plate 80 after rotating by the first predetermined angle, that is, the presser foot 30 does not fall down, the encoder 90 transmits a signal that the motor 10 completes the first work order to the controller. So that the controller will send a second operating command to the motor 10 to rotate the output shaft of the motor 10 a second predetermined angle on the basis of the first predetermined angle. When the encoder 90 detects that the motor 10 does not complete the second operation command, the controller will continuously send a third operation command to the motor 10 to keep the output shaft of the motor 10 at a third predetermined angle, so that the presser foot 30 generates a continuously stable pressure on the needle plate 80. Wherein the third predetermined angle is equal to the sum of the first predetermined angle and the second predetermined angle.
In this embodiment, the method for controlling the presser foot lifting device further includes: the controller is used to control the current of the motor 10 to control the pressure of the presser foot 30 on the needle board 80. By adopting the control mode, the pressure of the presser foot 30 on the needle plate 80 can be accurately controlled, so that the sewing accuracy is further improved.
Specifically, the control method of the presser foot lifting device in the embodiment further includes: a fourth operating command is sent to the motor 10 by the controller to rotate the output shaft of the motor 10 by a fourth predetermined angle opposite to the first predetermined angle and lift the presser foot 30.
In this embodiment, the method for controlling the presser foot lifting device further includes: the magnitude of the fourth predetermined angle is controlled by the controller to control the elevation height of the presser foot 30 by controlling the fourth predetermined angle.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the pressure of the presser foot can be conveniently and accurately controlled through the controller, and the sewing accuracy is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A presser foot lifting device, comprising:
a motor (10);
the transmission structure (20) is connected with the motor (10) so as to drive the transmission structure (20) to move through the motor (10);
the presser foot (30) is connected with the output end of the transmission structure (20) so as to drive the presser foot (30) to lift or fall through the transmission structure (20);
the controller is connected with the motor (10) and controls the pressure of the presser foot (30) by controlling the output current of the motor (10);
the encoder (90) is connected with the motor (10) and the controller, and the encoder (90) is used for detecting the working state of the motor (10) and feeding back the working state of the motor (10) to the controller.
2. The presser foot lifting device according to claim 1, wherein the transmission structure (20) is a link structure for moving the presser foot (30) via the link structure.
3. The presser foot lifting device according to claim 2, further comprising:
the pressure lever (40), the pressure lever (40) is connected with the presser foot (30), and the output end of the connecting rod structure is connected with the pressure lever (40) so as to drive the presser foot (30) to move through the pressure lever (40).
4. The presser foot lifting device according to claim 3, wherein the presser bar (40) is provided with a sliding groove, the output end of the link structure is movably arranged in the sliding groove along the extending direction of the sliding groove, and the output end of the link structure is abutted with the groove wall of the sliding groove so as to drive the presser bar (40) to be lifted or dropped through the sliding groove.
5. The device for lifting and pressing the foot as claimed in claim 4, characterized in that the output end of the connecting rod structure is a sliding block (21), a seat of the sliding block (21) is arranged on the pressing rod (40), and the sliding groove is arranged on the seat of the sliding block (21) so as to drive the pressing rod (40) to lift or fall through the matching of the sliding block (21) and the seat of the sliding block (21).
6. Presser foot lifting device according to claim 4, wherein the sliding slot extends in a direction perpendicular to the direction of movement of the presser bar (40).
7. A sewing machine, characterized in that it comprises:
a housing;
a presser foot lifting device provided on the housing, the presser foot lifting device being as claimed in any one of claims 1 to 6.
8. A method of controlling a presser foot lifting device, characterized in that the method of controlling a presser foot lifting device employs the presser foot lifting device according to any one of claims 1 to 6, and the method of controlling a presser foot lifting device includes:
sending a first working instruction to a motor (10) by using a controller so as to enable an output shaft of the motor (10) to rotate by a first preset angle and drive a presser foot (30) to fall down for sewing;
detecting whether the motor (10) executes the first working instruction or not when the presser foot (30) falls onto the needle plate (80) by using an encoder (90) and transmitting a signal to the controller;
when the motor (10) does not finish the first working instruction, the controller continuously sends the first working instruction to the motor (10) so as to enable the presser foot (30) to generate continuous and stable pressure on the needle plate (80).
9. The method of controlling a presser foot lifting device according to claim 8, further comprising:
when the motor (10) completes the first work instruction, the encoder (90) transmits a signal that the motor (10) completes the first work instruction to the controller;
enabling the controller to send a second working instruction to the motor (10) so as to enable the output shaft of the motor (10) to rotate by a second preset angle;
when the encoder (90) detects that the motor (10) does not complete the second work instruction, the controller continuously sends a third work instruction to the motor (10) to keep the output shaft of the motor (10) at a third preset angle, so that the presser foot (30) generates continuous and stable pressure on the needle plate (80);
wherein the third predetermined angle is equal to the sum of the first predetermined angle and the second predetermined angle.
10. The method of controlling a presser foot lifting device according to claim 8, further comprising:
the controller is used for controlling the current of the motor (10) so as to control the pressure of the presser foot (30) on the needle plate (80).
11. The method of controlling a presser foot lifting device according to claim 8, further comprising:
and sending a fourth working instruction to the motor (10) by using the controller so as to enable the output shaft of the motor (10) to rotate by a fourth preset angle and lift the presser foot (30), wherein the rotating direction of the fourth preset angle is opposite to that of the first preset angle.
12. The method of controlling a presser foot lifting device according to claim 11, further comprising:
controlling the magnitude of the fourth predetermined angle with the controller to control the elevation height of the presser foot (30) by controlling the fourth predetermined angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811648225.2A CN111379083A (en) | 2018-12-30 | 2018-12-30 | Presser foot lifting device, sewing machine and control method of presser foot lifting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811648225.2A CN111379083A (en) | 2018-12-30 | 2018-12-30 | Presser foot lifting device, sewing machine and control method of presser foot lifting device |
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| Publication Number | Publication Date |
|---|---|
| CN111379083A true CN111379083A (en) | 2020-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811648225.2A Pending CN111379083A (en) | 2018-12-30 | 2018-12-30 | Presser foot lifting device, sewing machine and control method of presser foot lifting device |
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| Country | Link |
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| CN (1) | CN111379083A (en) |
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| CN112195579A (en) * | 2020-09-11 | 2021-01-08 | 浙江镨美科智能刺绣设备有限公司 | Presser foot height self-adaptive adjusting method |
| CN112411042A (en) * | 2020-10-20 | 2021-02-26 | 诸暨玛雅电器机械有限公司 | Presser foot self-adaption method |
| WO2022156041A1 (en) * | 2021-01-21 | 2022-07-28 | 浙江沪龙科技股份有限公司 | Control method for avoiding, during mechanical linkage, fabric movement caused by lifting and lowering presser foot |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112195579A (en) * | 2020-09-11 | 2021-01-08 | 浙江镨美科智能刺绣设备有限公司 | Presser foot height self-adaptive adjusting method |
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| WO2022156041A1 (en) * | 2021-01-21 | 2022-07-28 | 浙江沪龙科技股份有限公司 | Control method for avoiding, during mechanical linkage, fabric movement caused by lifting and lowering presser foot |
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Application publication date: 20200707 |